203.237.128.0/17

AS4766  ·  Korea Telecom

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Summary

Country South Korea
Domain kren.kr
ASN AS4766
Registry APNIC
ID KREN

WHOIS Details

inetnum:        203.237.128.0 - 203.237.255.255
netname:        KREN
descr:          Korean Education Network
admin-c:        IM70-AP
tech-c:         IM70-AP
country:        KR
status:         ALLOCATED PORTABLE
mnt-by:         MNT-KRNIC-AP
mnt-irt:        IRT-KRNIC-KR
last-modified:  2017-02-02T04:55:27Z
source:         APNIC

irt:            IRT-KRNIC-KR
address:        9, Jinheung-gil, Naju-si, Jeollanam-do
e-mail:         irt@nic.or.kr
abuse-mailbox:  irt@nic.or.kr
admin-c:        IM574-AP
tech-c:         IM574-AP
auth:           # Filtered
remarks:        irt@nic.or.kr was validated on 2020-04-09
mnt-by:         MNT-KRNIC-AP
last-modified:  2025-09-04T01:00:01Z
source:         APNIC

person:         IP Manager
address:        57 Daehak-ro, Jongno-gu, Seoul
country:        KR
phone:          +82-2-882-5363
e-mail:         kindman@kren.kr
nic-hdl:        IM70-AP
mnt-by:         MNT-KRNIC-AP
last-modified:  2025-11-17T00:10:02Z
source:         APNIC

inetnum:        203.237.128.0 - 203.237.255.255
netname:        KREN-KR
descr:          Korean Education Network
country:        KR
admin-c:        IA142-KR
tech-c:         IM142-KR
status:         ALLOCATED PORTABLE
mnt-by:         MNT-KRNIC-AP
mnt-irt:        IRT-KRNIC-KR
changed:        hostmaster@nic.or.kr 20240912
remarks:        This information has been partially mirrored by APNIC from
remarks:        KRNIC. To obtain more specific information, please use the
remarks:        KRNIC whois server at whois.kisa.or.kr.
source:         KRNIC

person:         IP Manager
address:        57 Daehak-ro, Jongno-gu, Seoul
address:        1
country:        KR
phone:          +82-2-882-5363
e-mail:         kindman@kren.kr
nic-hdl:        IA142-KR
mnt-by:         MNT-KRNIC-AP
remarks:        This information has been partially mirrored by APNIC from
remarks:        KRNIC. To obtain more specific information, please use the
remarks:        KRNIC whois server at whois.kisa.or.kr.
source:         KRNIC

person:         IP Manager
address:        57 Daehak-ro, Jongno-gu, Seoul
address:        1
country:        KR
phone:          +82-2-882-5363
e-mail:         kindman@kren.kr
nic-hdl:        IM142-KR
mnt-by:         MNT-KRNIC-AP
remarks:        This information has been partially mirrored by APNIC from
remarks:        KRNIC. To obtain more specific information, please use the
remarks:        KRNIC whois server at whois.kisa.or.kr.
source:         KRNIC

Overlapping Ranges

BGP prefixes that are contained by 203.237.128.0/17

Range ASN Company Num of IPs
203.237.216.0/24 AS9318 DANKOOK UNIVERSITY 256
203.237.250.0/24 AS4766 Chungang University 256
203.237.217.0/24 AS9318 DANKOOK UNIVERSITY 256
203.237.190.0/24 AS9318 Shinhan University 256
203.237.168.0/24 AS18031 SANGMYUNG UNIVERSITY 256
203.237.169.0/24 AS18031 SANGMYUNG UNIVERSITY 256
203.237.170.0/24 AS18031 SANGMYUNG UNIVERSITY 256
203.237.171.0/24 AS18031 SANGMYUNG UNIVERSITY 256
203.237.172.0/24 AS18031 SANGMYUNG UNIVERSITY 256
203.237.173.0/24 AS18031 SANGMYUNG UNIVERSITY 256
203.237.174.0/24 AS18031 SANGMYUNG UNIVERSITY 256
203.237.175.0/24 AS18031 SANGMYUNG UNIVERSITY 256
203.237.226.0/24 AS9318 DANKOOK UNIVERSITY 256
203.237.223.0/24 AS9318 DANKOOK UNIVERSITY 256
203.237.222.0/24 AS9318 DANKOOK UNIVERSITY 256
203.237.160.0/24 AS3786 Dongyang Technical College 256
203.237.161.0/24 AS3786 Dongyang Technical College 256
203.237.162.0/24 AS3786 Dongyang Technical College 256
203.237.163.0/24 AS3786 Dongyang Technical College 256
203.237.164.0/24 AS3786 Dongyang Technical College 256
203.237.165.0/24 AS3786 Dongyang Technical College 256
203.237.166.0/24 AS3786 Dongyang Technical College 256
203.237.167.0/24 AS3786 Dongyang Technical College 256
203.237.172.0/24 AS3786 SANGMYUNG UNIVERSITY 256
203.237.254.0/24 AS38694 CHEONGJU NATIONAL UNIVERSITY OF EDUCATION 256
203.237.255.0/24 AS38694 CHEONGJU NATIONAL UNIVERSITY OF EDUCATION 256
203.237.221.0/24 AS9318 DANKOOK UNIVERSITY 256
203.237.220.0/24 AS9318 DANKOOK UNIVERSITY 256
203.237.219.0/24 AS9318 DANKOOK UNIVERSITY 256
203.237.154.0/24 AS4766 DAEJEON UNIVERSITY 256
203.237.156.0/24 AS4766 DAEJEON UNIVERSITY 256
203.237.157.0/24 AS4766 DAEJEON UNIVERSITY 256
203.237.158.0/24 AS4766 DAEJEON UNIVERSITY 256
203.237.159.0/24 AS4766 DAEJEON UNIVERSITY 256
203.237.191.0/24 AS4766 daekuUniversity of Education 256
203.237.204.0/24 AS4766 useokUniversity 256
203.237.205.0/24 AS4766 useokUniversity 256
203.237.206.0/24 AS4766 useokUniversity 256
203.237.207.0/24 AS4766 useokUniversity 256
203.237.208.0/24 AS4766 useokUniversity 256
203.237.209.0/24 AS4766 useokUniversity 256
203.237.210.0/24 AS4766 useokUniversity 256
203.237.211.0/24 AS4766 useokUniversity 256
203.237.212.0/24 AS4766 useokUniversity 256
203.237.213.0/24 AS4766 useokUniversity 256
203.237.214.0/24 AS4766 useokUniversity 256
203.237.215.0/24 AS4766 useokUniversity 256
203.237.224.0/24 AS4766 DANKOOK UNIVERSITY 256
203.237.225.0/24 AS4766 HALLYM COLLEGE 256
203.237.218.0/24 AS9318 DANKOOK UNIVERSITY 256

Nearby Ranges

BGP prefixes that overlap with 203.237.0.0/16

Range ASN Company Num of IPs
203.237.64.0/19 AS9778 KISTI 8,192
203.237.32.0/19 AS18297 Gwangju Institute of Science and Technology 8,192
203.237.0.0/19 AS10166 Korea Water Resources Corporation 8,192
203.237.96.0/19 AS9754 Korean Education Network 8,192
203.237.202.0/23 AS18026 CHEJU NATIONAL UNIVERSITY 512
203.237.175.0/24 AS18031 SANGMYUNG UNIVERSITY 256
203.237.160.0/24 AS3786 Dongyang Technical College 256
203.237.161.0/24 AS3786 Dongyang Technical College 256
203.237.162.0/24 AS3786 Dongyang Technical College 256
203.237.163.0/24 AS3786 Dongyang Technical College 256
203.237.164.0/24 AS3786 Dongyang Technical College 256
203.237.165.0/24 AS3786 Dongyang Technical College 256
203.237.166.0/24 AS3786 Dongyang Technical College 256
203.237.167.0/24 AS3786 Dongyang Technical College 256
203.237.172.0/24 AS3786 SANGMYUNG UNIVERSITY 256
203.237.254.0/24 AS38694 CHEONGJU NATIONAL UNIVERSITY OF EDUCATION 256
203.237.255.0/24 AS38694 CHEONGJU NATIONAL UNIVERSITY OF EDUCATION 256
203.237.154.0/24 AS4766 DAEJEON UNIVERSITY 256
203.237.156.0/24 AS4766 DAEJEON UNIVERSITY 256
203.237.157.0/24 AS4766 DAEJEON UNIVERSITY 256
203.237.158.0/24 AS4766 DAEJEON UNIVERSITY 256
203.237.159.0/24 AS4766 DAEJEON UNIVERSITY 256
203.237.191.0/24 AS4766 daekuUniversity of Education 256
203.237.204.0/24 AS4766 useokUniversity 256
203.237.205.0/24 AS4766 useokUniversity 256
203.237.206.0/24 AS4766 useokUniversity 256
203.237.207.0/24 AS4766 useokUniversity 256
203.237.208.0/24 AS4766 useokUniversity 256
203.237.209.0/24 AS4766 useokUniversity 256
203.237.210.0/24 AS4766 useokUniversity 256
203.237.211.0/24 AS4766 useokUniversity 256
203.237.212.0/24 AS4766 useokUniversity 256
203.237.213.0/24 AS4766 useokUniversity 256
203.237.214.0/24 AS4766 useokUniversity 256
203.237.215.0/24 AS4766 useokUniversity 256
203.237.224.0/24 AS4766 DANKOOK UNIVERSITY 256
203.237.225.0/24 AS4766 HALLYM COLLEGE 256
203.237.231.0/24 AS4766 HALLYM COLLEGE 256
203.237.250.0/24 AS4766 Chungang University 256
203.237.190.0/24 AS9318 Shinhan University 256
203.237.216.0/24 AS9318 DANKOOK UNIVERSITY 256
203.237.217.0/24 AS9318 DANKOOK UNIVERSITY 256
203.237.218.0/24 AS9318 DANKOOK UNIVERSITY 256
203.237.220.0/24 AS9318 DANKOOK UNIVERSITY 256
203.237.221.0/24 AS9318 DANKOOK UNIVERSITY 256
203.237.222.0/24 AS9318 DANKOOK UNIVERSITY 256
203.237.223.0/24 AS9318 DANKOOK UNIVERSITY 256

Hosted domains

There are 26 domain names hosted across 21 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.
Useful for Cybersecurity

Pingable IPs

839 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
203.237.254.120 AS38694 CHEONGJU NATIONAL UNIVERSITY OF EDCATION 2.94ms from Incheon, KR
203.237.169.203 AS18031 Sangmyung University 3.96ms from Seoul, KR
203.237.178.50 AS18329 Sangmyung University 4.36ms from Seoul, KR
203.237.160.222 AS3786 LG DACOM Corporation 2.03ms from Seoul, KR
203.237.157.186 AS4766 Korea Telecom 4.22ms from Seoul, KR
203.237.226.27 AS9318 SK Broadband Co Ltd 2.25ms from Incheon, KR
203.237.247.248 AS9318 SK Broadband Co Ltd 7.21ms from Incheon, KR
203.237.168.108 AS18031 Sangmyung University 1.49ms from Seoul, KR
203.237.204.196 AS4766 Korea Telecom 5.07ms from Seoul, KR
203.237.216.110 AS9318 SK Broadband Co Ltd 3.42ms from Seoul, KR
203.237.167.39 AS3786 LG DACOM Corporation 1.73ms from Incheon, KR
203.237.134.230 AS23983 Daejeon University 3.40ms from Seoul, KR
203.237.242.18 AS9318 SK Broadband Co Ltd 7.45ms from Incheon, KR
203.237.177.63 AS18329 Sangmyung University 4.35ms from Incheon, KR
203.237.201.254 AS4766 Korea Telecom 4.82ms from Incheon, KR
203.237.251.2 AS4766 Korea Telecom 1.31ms from Seoul, KR
203.237.198.54 AS4766 Korea Telecom 5.43ms from Seoul, KR
203.237.174.231 AS18031 Sangmyung University 2.20ms from Seoul, KR
203.237.183.62 AS18329 Sangmyung University 4.37ms from Seoul, KR
203.237.215.94 AS4766 Korea Telecom 4.63ms from Seoul, KR
203.237.156.84 AS4766 Korea Telecom 4.39ms from Seoul, KR
203.237.195.75 AS4766 Korea Telecom 5.46ms from Seoul, KR
203.237.241.171 AS9318 SK Broadband Co Ltd 7.43ms from Incheon, KR
203.237.165.28 AS3786 LG DACOM Corporation 1.85ms from Seoul, KR
203.237.194.29 AS4766 Korea Telecom 4.20ms from Seoul, KR

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address ASN Details
94.141.237.113 AS41798 JSC Transtelecom 1.04ms from Almaty, KZ
94.214.26.1 AS33915 Vodafone Libertel B.V. 5.74ms from Amsterdam, NL
104.156.139.1 AS49585 CoreRoute UG 0.49ms from Amsterdam, NL
47.209.248.1 AS19108 Optimum 14.40ms from Ashburn, US
67.133.234.1 AS395391 Talking Platforms, LLC 2.80ms from Ashburn, US
24.241.9.1 AS20115 Charter Communications LLC 7.62ms from Atlanta, US
174.80.200.1 AS20115 Charter Communications LLC 10.37ms from Atlanta, US
170.55.72.33 AS33132 Crown Castle Fiber LLC 0.74ms from Atlanta, US
139.55.8.113 AS7029 Windstream Communications LLC 3.31ms from Atlanta, US
1.91.229.49 AS17429 BEIJING GEHUA CATV NETWORK CO.LTD 10.56ms from Beijing, CN
186.23.235.1 AS27747 Telecentro S.A. 1.08ms from Buenos Aires, AR
181.166.57.1 AS7303 Telecom Argentina S.A. 7.69ms from Buenos Aires, AR
128.135.151.1 AS160 The University of Chicago 0.93ms from Chicago, US
195.178.106.1 AS44388 IT CONCEPT SRL 0.41ms from Chisinau, MD
83.93.23.1 AS3292 TDC Holding A/S 4.25ms from Copenhagen, DK
70.115.109.1 AS11427 Charter Communications Inc 2.49ms from Dallas, US
208.180.126.1 AS19108 Optimum 4.79ms from Dallas, US
103.43.228.1 AS133686 UNICEF 2.93ms from Delhi, IN
65.144.169.177 AS209 CenturyLink Communications, LLC 8.40ms from Denver, US
4.245.251.225 AS8075 Microsoft Corporation 0.16ms from Dublin, IE
80.145.115.225 AS3320 Deutsche Telekom AG 1.65ms from Duesseldorf, DE
181.222.96.1 AS28573 Claro NXT Telecomunicacoes Ltda 10.88ms from Fortaleza, BR
142.177.20.1 AS577 Bell Canada 15.25ms from Fredericton, CA
116.26.112.1 AS140308 CHINATELECOM Guangdong province Zhuhai 5G network 9.03ms from Guangzhou, CN
113.81.140.1 AS4134 CHINANET-BACKBONE 5.12ms from Guangzhou, CN

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.

$
traceroute -a -n -q1 -f6 -m14 203.237.190.220
traceroute to 203.237.190.220 (203.237.190.220): 14 hops max, 52 byte packets
7 [AS9318] 39.120.253.64 83.206 ms
8 *
9 *
10 *
11 [AS9318] 1.239.179.102 82.886 ms
12 *
13 *
14 *
Measurement taken from IPinfo ProbeNet in Jakarta, ID
On

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Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

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